25又4/5-2.35又3/8-8.6252又7/20

来源：学生作业帮助网编辑：作业帮时间：2024/11/16 04:42:15

25又4/5-2.35*又3/8-8.625*2又7/20
25又4/5-2.35*又3/8-8.625*2又7/20

25又4/5-2.35*又3/8-8.625*2又7/20
25·4/5-2.35×3/8-8.625×2·7/20
=25·4/5-2·7/20×3/8-8·5/8×2·7/20
=25·4/5-2·7/20(3/8+5/8)
=25·4/5-2·7/20
=25+4/5-2-7/20
=23+16/20-7/20
=23+9/20
=23·9/20